I am a little concerned about my heart. For a couple of weeks now I have intermittent pain in the chest, although it does not feel like heart pain, it s more centered on my sternum. Every once in a while I have a heartbeat that feels abnormally large; more like a thud but it returns to normal immediately after. Now, I feel a buzzing, which I am assuming is just the blood flow. I don t know if I m just being hyper-conscious of things since I m slightly concerned. I don t experience shortness of breath during the day or anything, and I work out 4-5 times a week, including with a personal trainer, and have never felt anything irregular or alarming. I have been smoking cigarettes more often these past few days since the holiday weekend. I just don t know if I m being irrational or if there s something I should look into? I should note that I just recently had my heart rate taken and it was great: 116/78. Should I seek tests or anything?